Internet access to LAN network not stable

May 18, 2011 at 05:09:47
Specs: Windows XPsp3, AMDx2
I have 12 computers in Local Area Network, I am using 3MB DSL broadband, all PC using XP SP3 connected through D-Link Switch with IP address 192.168.0.201 to 192.168.0.212, The D-Link router gateway is 192.168.0.1

Network diagram is as follows

ADSL modem
I
Router
I
PC1, PC2, upto PC 12

My problems are.

1. All PC cannot access Internet,
So I reset the modem, wait for a few minutes, if I am lucky, Internet comes back, sometimes have to wait longer 15mins or 30 mins

2. PC12 is used for monitoring, but cannot see PC 1, the rest can see.
When I try to ping, time out, but after sometimes....it came back, I can see PC 1, then disappear again.

How do I solve this problems?
Note, the ADSL modem provided by the Service provider looks normal, with Power, Ethernet and DSL lights ON.......so dont suspect the problem from ISP.

Very unstable access, hope someone could help me on this.
Thank you.

Reeko


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#1
May 18, 2011 at 06:05:09
What is the make & model of the modem from the ISP? What monitoring software is on PC 12? If you disconnect PC 12, does everything work?

How do you know when a politician is lying? His mouth is moving.


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#2
May 18, 2011 at 06:14:23
Modem from ISP is Zyxel, I am using the netmonitor employees pro.
If I off PC 12, everything still works.....
Someone advice me that I should put a fan...near the modem, router, and switch..to cool it down...since this equipment works 24hrs....can it be true? climate here is 32C to 34C.....

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#3
May 18, 2011 at 07:28:54
What do you mean everything still works, if PC 12 is off? Does that mean that there is no disconnect?

A fan is ok by the modem. What model is it?

How do you know when a politician is lying? His mouth is moving.


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Related Solutions

#4
May 18, 2011 at 19:06:06
Even when I off PC12, the problem still happen, not stable internet access, sometimes connected and sometimes not connected.

The modem model is ZxXel given by the ISP


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#5
May 18, 2011 at 20:23:57
That's not the model #.

How do you know when a politician is lying? His mouth is moving.


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#6
May 18, 2011 at 20:38:33
zyxel p-600 series

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#7
May 19, 2011 at 05:42:07
http://pctechnotes.com/how-to-confi...

Follow the configuration instructions there.

How do you know when a politician is lying? His mouth is moving.


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#8
May 19, 2011 at 05:59:42
Thanks Guapo for the configuration instructions, but there is a note saying

“There is no need to follow this guide if you have a separate router like linksys, dlink, edimax, tplink, etc. all configuration should be done on your router, leave your modem alone… default modem settings is bridge mode.”

Since I have a D-LInk router attached to the modem....maybe I should follow the advise...


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#9
May 19, 2011 at 06:20:12
Ok, but make sure that if there is an internal IP address given to the modem, that the router is on the same subnet.

How do you know when a politician is lying? His mouth is moving.


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#10
May 19, 2011 at 10:18:42
Not sure what guapo means but that last statement.
Only important thing is the routers wan interface is getting the public ip address provided by the ISP.

Reeko what we need is a post of a ipconfig /all from a internet working pc and a post from a nonworking pc for comparision.

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#11
May 19, 2011 at 11:25:15
Tonight I did check all the connections, this what I did.

1. Disconnect all the 12 PC link to Switch
2. Disconnect all the link from switch to Router
3. ReConnect PC1 direct to ADSL Modem (reconfigured PC IP address to none)
4. Switch Off ADSL Modem and On back, PC 1 reboot.
5. I got back Internet....good
6. Reconnect Router to Modem
7. Reconnect Router to Switch
8. Reconnect Only PC 1 to switch (reconfigure IP address to 192.168.0.201, gateway 192.168.0.1)
9. I got Internet Access for PC 1
10. Reconnect back PC2 to switch......IP address 192.168.0.202 gateway 192.168.0.1), test.....got Internet Access...
11. Reconnect back PC3 to switch...IP address 192.168.0.203 gateway 192.168.0.1...got internet
12. Reconnect back PC 3......until PC 12.....now all got Internet access
13. Let hopes everything will be OK....tommorow morning

One thing I notice is that the DSL lines....reset itself momentary....no internet for all PC for a few seconds.....is that cause by the router or by one of the PC ? or its normal from ISP....for dynamic IP address services (3Mb)


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#12
May 19, 2011 at 11:29:53
Wanderer, its either all the PC got Internet Access or Non at all.

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#13
May 19, 2011 at 15:11:39
a momentary down is most likely the ISP.
easy test is to do a tracert to one of the isps dns servers.
If it gets past the wan ip but fails after that its the isp that's the problem.

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#14
May 19, 2011 at 19:47:02
My network happen again....Internet access not stable....this morning, no access up to 17 minutes........I will find out more about tracert

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#15
May 20, 2011 at 05:33:59
Look at the event viewer on the server & some of the machines.

How do you know when a politician is lying? His mouth is moving.


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